Tonight's TV picks: 'Parks and Recreation' celebrates 100th episode

"Parks and Recreation" (8:30 p.m., NBC): The sitcom reaches its milestone 100th episode tonight, and Leslie (Amy Poehler) faces a big decision as her days in office draw to a close. Elsewhere, Chris and Ann (Rob Lowe, Rashida Jones) learn their baby's sex.

"White Collar" (9 p.m., USA): The show returns with fresh episodes, and producers are promising a surprise twist as a life hangs in the balance after Hagen (Mark Sheppard) tasks Neal (Matt Bomer) with his final assignment.

"The Crazy Ones" (9 p.m., CBS): Disaster strikes when a major client is faced with a public-relations disaster just as the flu bug hits the agency. Is there anyone well enough to handle the case?